Error Due Date Adjust codeunit 10700

Good afternoon, I’m starting in the world of Navision and I’m desperate to post-installation error when I’m using the RTC!
At the time of an invoice I get the error: not authorized to modify. Codeunit Error 10700 Due Date Adjust.
I searched the internet but I can not find anything, if I could help were greatly appreciated!
My version of Navision is 2009R2


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